He became the first pitcher to begin a season 10-0 — with all decisions coming in starts — since Clemens went 11-0 for Toronto in 1997, according to STATS. And Scherzer is the first to have at least six strikeouts in his first 14 starts in a season since Martinez did it in 2001 with Boston, STATS said.

“He’s at the top of his game pretty much,” Tigers manager Jim Leyland said.

Scherzer allowed one run and seven hits in six innings. Chris Davis hit his major league-leading 24th homer in the second, but struck out with the bases loaded in the fifth and the Orioles down by two runs.

Jake Arrieta (1-2) allowed five hits on 10 hits in 42⁄3 innings, and was sent to Triple-A Norfolk after the game with a 7.23 ERA.

“Stuff has never been an issue with Jake, it’s just command,” Orioles manager Buck Showalter said.

With two on and none out in the fifth, Arrieta struck out Cabrera on a wild pitch that allowed two runners to get into scoring position. Victor Martinez hit a sacrifice fly and Jhonny Peralta’s RBI single to give Detroit a four-run cushion in the fifth, chasing Arrieta.

Scherzer’s start ended after finishing off the sixth inning with two strikeouts, giving him at least 10 in a game for the fifth time this year.

Phillies 5, Nationals 4: At Philadelphia, Domonic Brown hit an RBI single with two outs in the bottom of the ninth inning to lift the Phillies.

The Nationals tied it at 4 when Chad Tracy hit a solo homer with two outs in the ninth off closer Jonathan Papelbon (1-0).

It was the first blown save for Papelbon, who had converted his previous 13 chances.

Reds 4, Pirates 1: At Cincinnati, Zack Cozart and Todd Frazier hit upper-deck homers off left-hander Francisco Liriano and the Cincinnati Reds moved a season-high 15 games over .500.

The Reds hit four solo homers in all, extending their best start since 1995, the last time they won a playoff series.

Cozart connected in the fourth and Frazier in the sixth off Liriano (5-3), who hadn’t allowed a homer in his seven previous starts.

He opened the season on the disabled list, recovering from a broken arm suffered last December.

Royals 2, Indians 1: At Cleveland, pinch-runner Elliot Johnson scored from third base on a wild pitch by reliever Matt Albers in the ninth inning, giving the Kansas City Royals a win.